77 Series III
Service Manual
ii
3-10. Diode Test .............................................................. 3-9
3-11. DC mA Test ............................................................ 3-10
3-12. DC Amps Test ........................................................ 3-11
3-13. Calibration .............................................................. 3-11
3-14. Troubleshooting .......................................................... 3-11
3-15. Supplemental Troubleshooting Procedures ............ 3-13
3-16. Checking the Crystal Oscillator ......................... 3-13
3-17. Checking The Reference Voltage ...................... 3-13
3-18. Checking Display Drive Voltage ....................... 3-13
3-19. Checking Beeper Drive Signal ........................... 3-13
3-20. Tracing the VDC Signal Path ............................. 3-13
4 List of Replaceable Parts............................................ 4-1
4-1. Introduction ................................................................. 4-3
4-2. How to Obtain Parts .................................................... 4-3
4-3. Newer Instruments ...................................................... 4-3
4-4. Service Centers ........................................................... 4-3
4-5. Manual Status Information ......................................... 4-4
4-6. Parts Lists .................................................................... 4-4
5 Schematic Diagrams................................................... 5-1
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